<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
<h1>xxxxxxxxxxxxxxxxxxx</h1>
<button onclick="sendMessage()">突突突</button>
</body>
<script>
  console.log(parent);
  function sendMessage() {
    window.parent.postMessage('-100', '*')
  }
</script>
</html>